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Auditory
System: Speech Areas
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| • |
Classical
division on basis of
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aphasia
following lesions:
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– |
Broca’s
area: understand
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language
but unable to speak
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or write
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– |
Wernicke’s
area: speaks but
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cannot
understand
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| • |
Current
understanding: not uniform areas. Rather,
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category-specific
with strongest activation proximal to the
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sensory
or motor area associated with that category:
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– |
Words
for manipulable objects (tools) activate reaching / grasping
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motor areas
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– |
Words
for movement activate next to visual motion areas
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Words
for complex objects (faces) activate visual recognition areas
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Ref: fMRI of
language: Susan Bookheimer, Ann. Rev. Neurosci. 25:151-88,
2002
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